how much in your head

Everything about Sudoku that doesn't fit in one of the other sections

how much in your head

Postby flybriguy » Tue Nov 18, 2008 7:37 am


I'm new this forum but have signed up because of my increasing interest and skill with this puzzle. I was wondering up to what point or what "difficulty" of puzzles can one reasonably solve sudoku puzzles in their head. I have found that it took me not too long to zip through easy and medium puzzles without making any pencil notations. However as I encounter many more difficult puzzles that I find that it is unavoidable to spot turbot fish or skyscrapers for instance without stuff penciled in. Hidden or naked doubles yes but that's about it. Not trying to save pencil or eraser expenses ;-) Just trying to see where my "head is at" and/or how mentally aware I could be in solving these puzzles faster.

Posts: 9
Joined: 15 November 2008

Postby eleven » Tue Nov 18, 2008 7:57 am

This thread by RW is old, but still the best:
Solving without pencilmarks
Posts: 1559
Joined: 10 February 2008

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